Microtek CX4 - Manual (Page 49)

No Sound
Check whether the audio output is in the Mute status. Press the
MUTE button on the operation panel.
Check to ensure that the volume is not turned all the way down.
Check to ensure that the RCA Cable (Audio) is connected
securely to the Audio source and the projector.
Check to ensure that a wrong source has not been selected. If
so, press the SOURCE button on the operation panel or on the
remote control for a right selection.
Unstable Image Displayed by VHS (Video Player)
This is normal due to the input signal from VHS is unstable.
Users are suggested to use S-video or component input instead,
if possible. Check to ensure that an extra length S-video cable is
not being used.
No response with remote control
Check if the battery runs out of power, or replace with new
batteries.
When taking remote control, please be noted if the button on remote control is
pressed. Which can result in continuous release of power and cause great power
consumption.
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